Daylight-charging, photographic-plate holder



June 11, 1929. cHAUVlN 1.717.187

' DAYLIGHT CHARGING, PHOTOGRAPHIC PLATE HOLDER Filed Sept. 1926 2 Sheets-Sheet 1 ficuewr: .ZI. Ghana/62v,

June 11. 1929. H. CHAUVIN 1,717,187

DAYLI'GHT CHARGING, PHOTOGRAFHTC PLATE HOLDER Filed Sept, 1926 2 Sneaks-Sheet 2 Patented June 11, 1929.

UNITED STATES -HENRI CHAUVIN, OF NOISY-LE-SEC, FRANCE.

DAYLIGHT-CHARGING, PHOTOGRAPHIC-PLATE HOLDER.

Application filed September 7, 1926, Serial No. 134,027, and in France September 11, 1925.

The present invention relates to a daylight-charging plate-holder for photographic apparatus. This holder for a sensitized plate is constructed very inexpensively with a view to being used once.

In the drawings:

Figure 1 is a plan view of the blank, unfolded.

Figures 2, 3, 4, 5 and 6 are sectional views showing consecutively the several steps employed in folding the side of the plate-holder.

Figures 7, S and 9 are similar views illus trating the way in which the bottom of the plate-holder is folded.

Figure 10 is a longitudinal cross section through the completed plate-holder taken along the line 101O of Figure 14 but on an enlarged scale.

Figure 11 is a cross section taken along the line 1111 of Figure 10.

Figure 12 is a cross section taken along the line 1212 of Figure 10.

Figure 13 is a cross section taken along the line 13-13 of Figure 10.

Figure 14 is a front elevation of the complete plate-holder including the slide.

Figure 15 is a plan view of the band which surrounds the plate-holder at the top.

Figure 16 is a cross section taken along the line 16-16 of Figure 15.

Figure 17 is a front elevation of the band unfolded.

Figure 18 is a plan view of the band.

The bottom of the plate-holder is composed of a sheet of opaque paper 1 (black paper or equivalent) out according to the outline of Figure 1, upon which I have shown in dot and dash lines a, the site for or location of the sensitized photographic plate which the holder is to receive.

The sheet 1 is extended on one of the narrower sides of this side or location by means of a strip 2. This strip extends along the whole width of the plate, and it is prolonged at both ends in the form of two tongues 3 which are joined to the strip 2 whilst, however, leaving free the lateral edges of a narrow margin or border 4.

A band or flap 5 extends beyond the location or emplacement of the latter at each of its longitudinal sides. The bands or flaps 5 are provided with redan-shaped parts or gussets 6, and the sheet 1 also has a footpiece or flap 7 which extends below the emplacement or site for the plate.

The flaps 5 and foot-piece 7 include portions 5 and 7 respectively, which are enfolded together with metal clips 8 and 10 respectively, in the assembling ol the plateholders.

Upon the front of sheet 1 where the photographic plate is to rest, there is placed, parallel with the position occupied by each of the longitudinal edges of this plate and at a certain distance, one of the small thin metal rule or clips 8 which is folded in two along its width, so as to form a channel to pinch the paper of the corresponding band or flap 5 at the fold indicated at Z) (Figures 1 and Towards the projecting or outstanding portion 2 of the bottom of the holder, the clips 8 terminate flush with the corresponding narrow side of the emplacement of the plate, while these same clips extend below the opposite narrow side of the said emplacement. Upon the projecting strip 2 there is arranged a strip of stuff 9 (such as flannel or similar material) which, however, leaves free and uncovered the narrow margin or border 4 which is then folded over the flannel, see Figure 10.

Each rule or clip 8 is next laid on its side in a direction away from the site occupied by the plate as shown in Figure 3. Then the flap 5 is folded. over the clip 8 as shown in Figure 5. This is done on both sides of the plate-holder so that these bands or flaps are superposed upon the site and the rules or clips are thus wholly covered by the paper. They are then rolled up in the latter by being caused to make a complete turn in the direction of the emplacement for the sensitized plate the first half turn being shown in Figure 5, while the completed told is shown in Figure 6. The rules or clips finally rest upon the longitudinal edges of the plate and the mouth or opening in the fold of each of the clips then faces the mouth or opening in the fold of the other (Figures 6 and 7). Into these it'olds or months the longitudinal edges of the covering shutter or slide 9 for the holder are inserted, which shutter or cover is of thin, black, opaque card board or the like.

The flap 7 is afterwards folded over the neighbouring portion of the sensitized plate, above the lower ends of the Clips 8, the line of folding of the flap being exactly determined by the extremities of these clips. The fold of the flap 7 is inserted in the hollow of another rule or clip 10 folded in its width in such a way as to form a groove and of which the length corresponds with the width of the sensitized plate.

The two edges of this transverse rule or clip 10 are sufiiciently spaced apart at and to wards its extremities to afford a housing for wards this latter the mouth oropening formed by its folding, which mouth is lined interiorly with paper and receives one of the edges of the covering shutter or slide 9. This extremity 9 of the shutter or slide is bent back on the latter and secured in this position and in its middle portion by adhesive or equivalent means. in this way the shutter can enter into the fold or aperture of the clip 10 without abutting against the edge of the narrow groove formed by this clip in its middle portion. The provision centrally of an adhesive causes a slight give or yield in the middle of the out-turned edge of the shutter.

Thetongues 3 are folded over in succession upon the corresponding extremity of the shutter or slide 9 and fastened together by adhesive 3 or otherwise. Upon the head of the plate-holder thus formed, a wrap or enclosing band is slipped or otherwise secured, obtained as shown by Figures 17 and 18. This wrap or band is composed of a strip of paper 11 folded in two in the direction of its width and in the fold of which there are inserted two flexible laminae or thin plates 12 of a length slightly greater than the width of the slide or shutter 9. These two laminae are slightly incurved in the direction of their length and placed in such a manner that their convexities bear one against the other when the band of paper 11 is folded upon itself in the direction of its length (Figure 12). A certain length of the band of paper 11 extends bcyond the laminae 12; this extremity of the said band is folded upon the other and secured thereto by adhesive.

The laminae or thin plates have for object to force one against the other, the top of the shutter or slide and the top of the head of the holder provided with the flannel or other strip 9, which arrangement ensures that the head of the holder is light-tight.

The wrap or band for the head of the plateholder forms a stop or abutment for the sensitized plate, the cross member 10 also forming an abutment for the other end of said plate so that the latter is maintained between two abutments.

In order to use in a given apparatus, sensitized photographic plates fitted into a holder made according to the invention, an adapter must be employed, consisting for example, of a frame with edges turned up on three of these sides in such a way as to surround the plateholder except at its head. A bottom piece is hinge-jointed upon the side of the frame which is opposite to the head of the holder. This bottom piece is provided, fixed at its centre, with a plate spring which bears upon the back of the plate-holder to ensure the correct positioning of the latter. Its upper edge is provided with a thick strip of felt or equivalent material intended to exert upon the head of the plate-holder, a gentle pressure, but at the same time a sufficiently firm pressure to prevent all movements of the plate-holder when the shutter or slide is pulled out so as to uncover the plate and to assure a perfect seating of the thinned, head, of the plateholder againstthe velvet of the adapter. The withdrawal movement of the shutter or slide is stopped by the contact of its turned-up edge with the wrap or band-on the head of the chassis. This same edge enters without difliculty into the gicovc which is formed by the cross member 10 when the shutter is slid back after the exposure has been made. The bottom piece of the adapter is furnished with a latching or bolting device which with advantage may be formed by a bar a little wider than this bottom piece, which device is mounted transversely. thereof by meansof rivets capable of sliding perpendicularly to the hinge in holes in said bottom piece. lVhen the bar is pushed to the end in one direction of its movement, its projecting extremities engage in hooks which are formed by the edges of the frame of the adapter and said extremities are freed from these hooks when the bar reaches its other extreme sliding position r WVhat I claim is:

l. A daylightcharging, photographic plate-holder, comprising a sheet of a pliable and opaque matter, of which area is larger than that of the plate, two rules longitudinally folded, and adapted to rest against the corresponding edge of the sensitized plate, means to fix the sheet to said rules, a shutter sliding in a groove of said rules, means to close the baseof the holder and means to press the top of the sheet and the shutter one against the other.

2. A daylight charging, photographic plate-holder, comprising a sheet of a pliable and opaque matter, of which area is larger than that of the plate, two rules longitudinally folded, and adapted to rest against the corresponding edge of the sensitized plate, folds of the sheet pinched each in the fold of one of the rules, a shutter sliding in a groove of said rules, means to close the base of the holder and means to press the top of the sheet plate-holder, comprising a sheet of pliable and opaque matter, of which area is larger than that of the plate, two rules longitudinally folded, and adapted to rest against the corresponding edge of the sensitized plate, means to fix the sheet to said rules, a shutter sliding in a groove of said rules, a third rule, longitudinally folded, adapted to be wrapped i nthe base of the sheet and to receive the base of the shutter.

at. A daylight-charging, photographic plate-holder, comprising a sheet of a pliable and opaque matter, of which area is larger than that of the plate, two rules longitudinally folded, and adapted to rest against the corresponding edge of the sensitized plate, their bases extending clearly beyond the base of the plate, means to fix the sheet to said rules, a shutter sliding in a groove of said rules, a third rule, longitudinally folded adapted to the wrapped in the base of the sheet an dto receive the projecting ends of the first rules and the base of the shutter.

5. A daylight-charging, photographic plate-holder, comprising a sheet of a pliable and opaque matter, of which area is larger than that of the plate, two rules longitudinally folded, and adapted to rest against the corresponding edge of the sensitized plat-e means to fix the sheet to said rules, a shutter sliding in a groove of said rules, a told at the base of the shutter, 21 third rule adapted to be wrapped in the base of the sheet and to re ceive the folded base of the shutter.

G. A daylightcharging, photographicplate-holder, comprising a sheet of a pliable and opaque matter, of which area is larger than that of the plate, two rules longitudinally folded, and adapted to rest against the corresponding edge of the sensitized plate, means to fix the sheet to said rules, a shutter sliding in a groove of said rules, a fold at the base of the shutter, fixed but in a point, a third rule, adapted to be wrapped in the base of the sheet and to receive the folded base of the shutter.

7. A daylight-charging, photographic plateholder, comprising a sheet of a pliable and opaque matter, of which area is larger than that of the plate, two rules longitudinally folded, and adapted to rest against the corresponding edge of the sensitized plate, means to fix the sheet to said rules, a shutter sliding in a groove of said rules, means to close the base of the holder, two flexible laminae incurved one against the other, adapted to press the top of the sheet and the shutter one against the other.

In testimony whereof I have signed my name to this specification.

HENRI CHAUVIN. 

